Water-resistant glue



115;. L m. 1 nez 79 comma R PtA3TIG, Crass ggfamgs 4 generally containingsuch cement.

' v molding process.

Patented Nov. 13, 1923.

UNITED 'STAT'ESQPATENT OFFICE.

WILLIAM A. DRU'SHEL, or GRAND RAPIDS, MIofiIeAn, ASSIGNOB 'ro HASKELITE MANUFACTURING CORPORATION, or GRAND RAPIDS, MICHIG N.

WATER-RESISTANT GLUE.

No Drawing.

5 State of Michigan, have invented certainnew and useful Improvements in Water- Resistant Glues, of which the following is a A specification.

Thls invention relates to improvements in casein or similar glue or cement and to laminated wood or material comprising the same and t0 the process of preparing and building the material. Y

The objects of the invention are:

F irst,.to provide a casein lue or cement that shall be retarded or s ow to harden, thus enabling its ready distribution and handling with the usual glue distributing machinery.

Second, to provide such a cement that shall be highly water resistant and practically insoluble.

Third, to provide a laminated wood retained by such cement.

Fourth, to provide a laminated structure Fifth to provide an improved molded laminated structure.

Sixth, to provide improved processes for such manufacture.

Further objects, and objects relating to details'and economies will clearlyappear from the description to follow.

I accomplish the'objects of my invention by. the means described in the following specification. The invention is clearly defined and pointed out in the claims.

Broadly considered, my invention consists in the discovery that the addition of sodium 40 silicate or potassium silicate tothe usua casein lue ormu a, ere y .replacinga part of the base, will retard the action, and when the glue or cement finally does harden a superior glue capable of being soaked or boiled and molded will be produced. This holds laminated wood or other material so that the same can be manufactured by a In practice I mix finely ground casein e, sgdiu n hydroxide and sodium fillOIl e in dry form m any of the known proportions for ordinary casein glue in dry 'form.

Application filed March 12, 1919. Serial No. 282,185. 7

The proportions I secure satisfactory results with are:

Parts.

Casein to Lime (hydroxidel 27 to 20 Sodium hydroxide 6 to 3' Sodium fluoride 2 to 1 These in redients are thoroughly mixed as dry pow er-and then admixed with water in the usual manner for such glue. m

stirring from five to ten minutes I stir in a sodium ilicate solution of from 40% to 10% strength and continue stirring for about one minute. The amount of sodium silicate may be varied from 3 parts to 20 parts. Good results are secured by adding 6 to 15 parts.

Panels of laminated wood or other material made with a glue or cement thus prepared Withstand soaking or boiling andmolding and I prepare molded panels in this way.

The veneer or other laminated material. is thorou hly coated and the glue or cement allowed time to fully penetrate, The panels are then subjected to the usual pressure of glued panels. The panels are then boiled until the layers and glue or cement are softened when the whole structure is molded in suitable molds and allowed to harden and set. The joint between layers is not loosened by this treatment.

A otassi ilicate solution may beemployed nstead of the sodium silicate solution with satisfactory results.

h (Glrood resultds. a1?i possible when the 2 id an goll iininfluoridaielie @I e.

pre er to use the same as they are of ad vantage in securing the most thorough ac- .tion. There are many albumins or albuminous materials that are ava besi es casein.

ey s ould be rendered thoroughly alkaline. This is very effectively accomplished by'pulverizing the materials.

very superior results. 1

I desire to claim particularly the casein and also desire to claim both the product and process broadly as pointed out in the apIpIended claims.

Casein gives,

aying thus described my invention,"

what I claim as new and desire to secure by Letters Patent, is: I

1. A water resistant glue or.cement comprising casein 65 to 75 parts, lime hydroxide 27 to parts, sodium hydroxide 6 to 3 parts, sodium fluoride 2 parts, and from 3 to 20 arts of a 40% to 45% strength solution 0 silicate of soda, the same having the Quality of remaining in fluid or pasty conition for a period of several hours.

2. A water resistant glue or cement comprising casein 65 to 75 parts, lime hydroxide 27 to 20 parts, sodium hydroxide 6 to 3 parts, and from 3 to. 20 parts of a 40%-to 45% strength solution of silicate of soda, the same having the quality of remaining in fluid or pasty condition for a period of several hours.

3. A water resistant glue or cement comprising casein 65 to 75 parts, lime hydroxide 27 to 20 parts, sodium fluoride 2 parts, and from 3 to 20 parts of a to strength solution of silicate of soda, the same having the quality of remaining in fluid or pasty condition for a period of several hours.

4. A water resistant glue or cement comprising casein 65 to 75 parts, lime hydroxide 27 to 20 parts, and from 3 to 20 parts of a 40% to 45% strength solution of silicate oi soda, the same having the quality of remain ing in fluid or pasty condition for a period of several hours.

5. The process of preparing a glue material consisting in admixing casein powder 65 to 75 parts, dry lime hydroxide- 27 to 20 parts, dry sodium hydroxide 6 to 3 parts and sodium fluoride 2 to 1 parts, thoroughly and evenly admixing the said powder, then from five to ten minutes and adding thereto 4 from three to twenty parts of a forty to forty-five per cent strength of sodium silicate solution, and thoroughly admixing the same.

6. The process of preparing a glue material consisting in admixing casein powder 65 to 75 parts, dry lime hydroxide 27 to 20 parts, and dry sodium hydroxide- 6 to 3 parts, in substantially the proportions specified, thoroughly and evenly admixing the said powder, then admixing with the water to form the usual pasty gluey mass, stirring for a period of from five to ten minutes and adding thereto from three to twenty parts of a forty to forty-five per cent strength of sodium silicate solution, and thoroughly admixing the same.

7 The'process of preparing glue material consisting in admixing albuminous material 65 to 75 parts, lime 27 to 20 parts and alkaline 6 to 3 parts evenly and thoroughly in powdered form, thereafter adding water,

stirring the same to thoroughly admix the- .materials and immediately adding from three to twenty parts of a forty to fortyfiveper cent solution of sodium silicate and thoroughly stirring the same.

In, witness whereof, I have hereunto set my hand and seal in the presence of two witnesses.

WILLIAM A. DRUSHEL. [1,. s.] -Witnesses:

M. PROOL, CLYDE E. SMEDLEY. 

